Combination automatic window lock, balance and lift



I P. L THRONE. I COMBINATION AUTOMATICWINDOW LOCK, BALANCE, AND LIFT. 1,420,503.

APPLICATION FILED NOV. 2, 1921.

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P. L. THRONE.

COMBINATION AUTOMATIC WINDOW LOCK, BALANCE, AND LIFT.

Patented June 20, 1922.

2 SHEETS-SHEET 2.

' I PZLT/z/whe firs PENN L. TrraoNE, or HARRISBURG, PENNSYLVANIA;

Specification of Letters Patent. Patented June 20, 1922,

Application filed November 2, 1921. Serial No. 512,306

T 0 all whom it may concern: I

Be it known that I, PENN L. THRONE, a citizen of the United States, residing at Harrisburg, in the county of Dauphin and State of Pennsylvania, have-invented cer-. tain new and useful Improvements in Combination Automatic Vindow Locks, Balances, and Lifts; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it ap pertains to make and use the same.

This invention relates to new and useful improvements in sash fixtures for windows and has for its primary object the provision of a device of the stated character that will provide a balance, a lift, and a lock for the sashes of a window and is adapted to normally urge the upper sash closed and to open the lower sash when free and to lock both sashes when desired against being opened from outside of the window.

Another object of this invention is the provision of a fixture of the above stated character which will obviate the use of balance weights, their cords and the usual pulleys and weight boxes and which will be simple, durable, and efficient, and which may be manufactured and-sold at a comparatively low'cost.

With these and other objects in view as will become more apparent as the description proceeds, the invention consists in certain novel features of construction, combination, and arrangement of parts as will be hereinafter ,morefully described and claimed.

For a complete understandingoof my" invention reference is to be had to the following description and accompanying drawings, in which Figure 1 is a front elevation, partly in section illustrating an automatic window lock, balance and liftrconstructed in, accordance with my invention,

Figure 2 is a sectional view, illustrating one of the fixtures,

Figure 3 is an elevational view illustrating the same, 1

Figure 4 is a fragmentary view illustratin the upper sash,

*igure 5 is a similar view illustrating the lower sash, and

.ing rod 17 a head and extends through Figure 6 is a detail sectional view illustraiting a tension spring for the operating ro Referring in detail to the drawings, the numeral 1 indicates a window frame reinforced on its outer sides midway its ends by blocksQ and has the usual slidabl e upper and lower sashes 3 and 4: each equipped with rack bars 5 secured along the vertical edges thereof and said rack bars extend the full length of said sashes and are engaged by driving gears 6., A pair of fixtures are provided for the upper and lower, sashes and are arranged at opposite sides ,ofthe frame and the drive gears 6 form a part of said fixtures. The fixtures are identical in constructionand reference to one specifically is thought sufiicientfor both. A tubular casing 7 is positioned within a socket 8 formed in the window frame and the block 2 and is provided at one side with a slot 9 to permit the drive gears 6 to extend outwardly of said casing to mesh with the bar 5. The casing 7 along the opening or slot '9 has formed thereon wing plates 10 that are provided with openings 11 to receive screws '12 which extend through the frame l and into the block 2 for the purpose of firmly anchoring the casing within the socket 8. The casing7 includes sections 13 and let. The inner end of the section 13 is closed by an end wall 15 and is connected to the front wall 16 of the section 14 by an anchor- The rod 17 is equipped with the front-wall 16 and has threaded connection with an opening formed in the end wall 15 of the section 13 thereby firmly fastening the walls 16 and 15 to their 1 respective sections and also to. hold the sections in engagement with each other. k-partition 18 separates the section 413 from the section 14 ,and has annular flanges '19 formed .thereon which abut the inner walls of the sections 13 and 14: and said partition is provided with an opening to permit the anchoring rod 17 to extend therethrough and also has an extension 19 to engage the walls of the slot 9 to prevent rotation thereof in the easing. The section 13 adjacent to the end wall 15 is provided with an internal annular flange 20 engaged by a partition 2'1 and the latter is provided with an opening to receive the anchoring rod 17 and also with an extension 20 that engages the walls of the slot 9. A partition 22 is located within the section 13 and is spaced a slight distance from the partition 21 and has an angularly related portion 23 which abuts against the wall of the section 13 and also against the partition 21. The partitions 21 and 22 are provided with openings to permit the anchoring rod 17 to extend therethrough and the partition 22 is provided with an extension to engage the walls of the slot 9. Theend wall 15 and the partition 21 form a gear chamber 24: and the partitions 22 and 18 form a gear chamber 25. The end wall 15 and the partition 21 have journaled therein a shaft 26, one end of which projects beyond the partition 21 and is provided with flats to receive a key or similar device for rotating the shaft for the purpose of winding a spring which will be hereinafter more fully described. The partitions 18 and 22 rotatably support a shaft 27 and the end which projects beyond the partition 18 is provided with flats to be engaged by the key. Clock springs 28 are located in the chambers 24 and 25 and have their inner ends secured to the shafts 26 and 27 while their outer ends are secured to screw bolts 19*, one of which connects the partitions, 18 and 22, while the other one connects the partitions 21 and 15. The partitions with their extensions will prevent the former from rotating in the casing under the weight of the window sashes. The gears 6 are journaled on the shafts 26 and 27 and located adjacent to the springs and said gears have associated therewith ratchet gears 30 which are fixed or secured to the shafts 26 and 27 and areengaged by pivoted dogs 31 that are pivoted to the gears'6 and are engaged by springs 32 for the purpose of urging their active ends into engagement with the ratchet gears. The dogs and ratchet gears are adapted to im part rotation to the drive gears 6 from the shafts 26 and27 and the latter receive their rotation from the springs 28. A control shaft 33 is journaled in-the end walls 15 and 16 and the partitions 18, 22 and 21. One end of the shaft or rod 33 extends through the front wall 16 and has a removable finger piece 35 secured thereto. Dogs 37 are secured to the rod or shaft 33 and are adapted to be turned into engagement with the teeth of the drive gears 6 for the purpose of holding said gears against rotation. The shaft or rod 33 is provided with flats or faces 38 and is engaged by a leaf spring 39 which has a bearing portion 39 and coiled ends 40 that engage the flats and also the ends 40 engage the casing and the partition 22 is cut out to receive the spring. The spring is adapted to prevent accidental rotation of the rod or shaft but will permit the same to be rotated manually for the purpose of engaging and disengaging the dogs 37 with the gears 6.

The gear 6 in the chamber 24 is adapted to engage the rack bar on the upper sash while the gear 6 in the chamber 25 is adapted to engage the rack bar on the lower sash and the gear 6 in the chamber 24 normally urges the upper sash into a closed position while the action of the gear 6 is to elevate or raise the lower sash when the gear 6 is freed or its respective dog 37 disconnected therefrom.

With reference to the drawings, it will be noted that the gears 6 and their respec-' tive driving means are located and supported in separate chambers and when assembling the device, the section 13 is first positioned within the socket 8 of the window frame 1. Prior to placing the casing 13 into the socket 8, the gear 6 and its driving means located in the chamber 25 is removed and the shaft 26 is rotated through the medium of a suitable key for the purpose of winding the spring located in the chamber 24. After the spring 28 in the chamber. '24

has been properly tensioned to raise the upthrough the medium ofa suitable key to place the respective spring under a suitable tension. The section 1 1 is then applied or placed in abutting engagement with the partition 18 and joined or held against separation from the section 13 by the anchoring rod 17 The front wall 16 is provided with a key opening 44 through which the key may be inserted for winding the shaft 27 when desired. It is to be understood that the operating medium includes the drive gear 6, spring 28, and the pawls and ratchet wheels fixed to the shaft on which the gear 6is journaled. To reduce friction and to prevent binding of the upper and lower window sashes, said sashes are provided with anti-friction rollers 45. 7 H 1 Referring to the drawings it will be clearly seen that it is impossible for the window sashes to be unlocked from a point outwardly preferred embodiment of my invention, it

will be understood that minor changes in construction, combination, and arrangement: of parts may be made without departing from the spirit and scope of the invention as claimed.

Having thus described my invention, I

what I claim is 1. In a window, a rack bar applied to the sash a spring gear applied to the window frame and in cooperative relation with the rack bar to operate as abalance or lift for the sash and a locking dog coacting with the spring gear to secure the sash in any adjusted position within its range of movement.

2. A window fixture of the character specified comprising a casing, bearings removably fitted to the casing, a shaft mounted in said bearings, a gear wheel loose on the shaft, a ratchet connection between the gear wheel and shaft and a coil spring mounted on the shaft and adapted when wound to effect rotation thereof.

3. A spring window fixture of the character specified comprising a casing, a spring gear mounted within the casing, an adjustable section for the casing to adapt the same for different thicknesses of walls, an end closure for the casing and a section thereof.

4. A spring window fixture comprising a casing having an opening in the side thereof, opposed wings or flanges on opposite sides of the openings and forming a base plate for the casing and a spring gear within the casing and having its tooth portion projecting through the side opening thereof.

5. A spring fixture for windows comprising a casing, a plurality of spring gears therein, a shaft mounted within the casing and locking dogs secured to the shaft, one for each spring gear.

6. A spring fixture for windows the same comprising a casing, a plurality of spring gears removably fitted within the casing, a section forming an extension of the casing whereby to adapt the fixture to walls of clifferent thicknesses, a plate closing the outer end of the said extension, a shaft mounted in the casing and the extension thereof, and locking dogs fastened to the shaft one for each spring gear.

In testimony whereof I affix my signature in presence of two witnesses.

PENN L. THRONE.

Witnesses:

JOHN B. NICHOLAS, J r., JAMEs MORRISSEY, Jr. 

